How to Create Write and Read a file in iphone without using playerprefs in unity3d

it is not that easy to read or write file in iphone we have to give the specific path in order to read or write.
here is the sample code

using UnityEngine;
using System.Collections;
using System.IO;
using System.Text;

public static class GameManager
{
private static string path;

public static void starting ()
{
    path = Application.dataPath.Substring (0, Application.dataPath.Length - 20 )+"Documents";
}

//---------------------file handleres------------------------------

public static void writeToFile(string filename , int value)
{
    StreamWriter sw = new StreamWriter(path+"/"+filename);
    string temp = value.ToString();
    sw.Write("");
    sw.WriteLine(temp);
    sw.Close();
}
public static int ReadFromFile(string filename )
{
    StreamReader sr = new StreamReader(path+"/"+filename);
    string temp = sr.ReadLine();
    int anothertemp = int.Parse(temp);
    sr.Close();
    return anothertemp;
}

//---------------------file handleres------------------------------

}

Each app only have access to “Documents” folder under it. That’s the place we could use to write or read or create.